What is the special feature present in a human heart which does not allow the mixing of blood when oxygen-rich and carbon dioxide-rich blood reaches the heart?
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Solution
The special feature of the human heart:
There is a special feature known as the septum present in the human heart which does not allow the mixing of blood and act as a dividing wall that is present between the left side and right side of the heart.
With the division of the heart into four parts, the septum is also known by two names one is inter-atrial and the other is an interventricular septum which contains deoxygenated and oxygenated blood respectively.